[Enh]: Support for narwhals.Expr.hist

[mscolnick]

We would like to learn about your use case. For example, if this feature is needed to adopt Narwhals in an open source project, could you please enter the link to it below?

This is for marimo

We already use narhwals, but this would help with performance.

Please describe the purpose of the new feature or describe the problem to solve.

We would like to move some of our vega charts for y=count(*), x=bin(column) that get binned on the frontend to be on the backend. Since they are just a summary per column, we could achieve this with narwhals.Expr.hist

Suggest a solution if possible.

narwhals.Expr.hist similar to polars.Expr.hist

for us in particular, we are looking to support:

• polars
• pandas
• pyarrow
• ibis (but can convert to pyarrow)

If you have tried alternatives, please describe them below.

Alternative would be using vegafusion but that is an additional dependency that we could potentially avoid.

Additional information that may help us understand your needs.

No response

[MarcoGorelli]

thanks for the request - I'd say that this is in-scope. not yet sure how we'd do it for pyarrow but we can explore it